CVE-2023-49105

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-08-27), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 43%CVSS: 9.8Exploit: cisa kev · ssvc active · epss top5pct · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

An issue was discovered in ownCloud owncloud/core before 10.13.1. An attacker can access, modify, or delete any file without authentication if the username of a victim is known, and the victim has no signing-key configured. This occurs because pre-signed URLs can be accepted even when no signing-key is configured for the owner of the files. The earliest affected version is 10.6.0.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
43%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

November 21, 2023

Last Modified

August 28, 2026

Advisory Details (4)

Auto-updated Sep 25, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-49105
generic

Philippine Nuclear Agency and Naval Contractor Targeted by Suspected Chinese-Speaking Operator Using Known Vulnerabilities

https://hunt.io/blog/chinese-speaking-operator-philippine-nuclear-naval-contractor
generic Patch Available

ownCloud security policies and information

https://owncloud.org/security
generic

WebDAV Api Authentication Bypass using Pre-Signed URLs - ownCloud

https://owncloud.com/security-advisories/webdav-api-authentication-bypass-using-pre-signed-urls/

Vendor Advisories for CVE-2023-49105(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 61× in last 7d / 249× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 371 total refreshes for this CVE.

  1. 2026-09-25 10:09 UTCGHSA enrichment
  2. 2026-09-25 06:21 UTCGHSA enrichment
  3. 2026-09-25 02:33 UTCGHSA enrichment
  4. 2026-09-24 22:45 UTCGHSA enrichment
  5. 2026-09-24 19:31 UTCCISA KEV update
  6. 2026-09-24 18:57 UTCGHSA enrichment
  7. 2026-09-24 15:09 UTCEG score recompute
  8. 2026-09-24 15:09 UTCGHSA enrichment
  9. 2026-09-24 14:01 UTCEPSS rescore
  10. 2026-09-24 14:01 UTCEPSS rescore
  11. 2026-09-24 11:21 UTCGHSA enrichment
  12. 2026-09-24 07:34 UTCGHSA enrichment
  13. 2026-09-24 03:45 UTCGHSA enrichment
  14. 2026-09-23 23:56 UTCGHSA enrichment
  15. 2026-09-23 20:09 UTCGHSA enrichment
  16. 2026-09-23 16:21 UTCEG score recompute
  17. 2026-09-23 16:21 UTCGHSA enrichment
  18. 2026-09-23 13:46 UTCEPSS rescore
  19. 2026-09-23 12:33 UTCGHSA enrichment
  20. 2026-09-23 08:45 UTCGHSA enrichment
  21. 2026-09-23 04:58 UTCGHSA enrichment
  22. 2026-09-23 01:10 UTCGHSA enrichment
  23. 2026-09-22 21:22 UTCGHSA enrichment
  24. 2026-09-22 19:36 UTCCISA KEV update
  25. 2026-09-22 17:35 UTCEG score recompute
Show 75 more
  1. 2026-09-22 17:35 UTCGHSA enrichment
  2. 2026-09-22 14:46 UTCEPSS rescore
  3. 2026-09-22 13:44 UTCGHSA enrichment
  4. 2026-09-22 09:56 UTCGHSA enrichment
  5. 2026-09-22 06:08 UTCGHSA enrichment
  6. 2026-09-22 02:20 UTCGHSA enrichment
  7. 2026-09-21 22:32 UTCEG score recompute
  8. 2026-09-21 22:32 UTCGHSA enrichment
  9. 2026-09-21 20:31 UTCEPSS rescore
  10. 2026-09-21 19:09 UTCCISA KEV update
  11. 2026-09-21 18:45 UTCGHSA enrichment
  12. 2026-09-21 14:57 UTCGHSA enrichment
  13. 2026-09-21 11:08 UTCGHSA enrichment
  14. 2026-09-21 07:20 UTCGHSA enrichment
  15. 2026-09-21 03:31 UTCGHSA enrichment
  16. 2026-09-20 23:43 UTCGHSA enrichment
  17. 2026-09-20 19:55 UTCGHSA enrichment
  18. 2026-09-20 16:07 UTCGHSA enrichment
  19. 2026-09-20 12:16 UTCGHSA enrichment
  20. 2026-09-20 08:28 UTCGHSA enrichment
  21. 2026-09-20 04:40 UTCGHSA enrichment
  22. 2026-09-20 00:51 UTCGHSA enrichment
  23. 2026-09-19 21:03 UTCGHSA enrichment
  24. 2026-09-19 17:15 UTCEG score recompute
  25. 2026-09-19 17:15 UTCGHSA enrichment
  26. 2026-09-19 13:26 UTCGHSA enrichment
  27. 2026-09-19 09:38 UTCGHSA enrichment
  28. 2026-09-19 05:47 UTCGHSA enrichment
  29. 2026-09-19 01:59 UTCGHSA enrichment
  30. 2026-09-18 22:11 UTCEG score recompute
  31. 2026-09-18 22:11 UTCGHSA enrichment
  32. 2026-09-18 19:26 UTCEPSS rescore
  33. 2026-09-18 19:20 UTCCISA KEV update
  34. 2026-09-18 18:24 UTCGHSA enrichment
  35. 2026-09-18 14:36 UTCGHSA enrichment
  36. 2026-09-18 14:15 UTCCISA KEV update
  37. 2026-09-18 10:48 UTCGHSA enrichment
  38. 2026-09-18 07:00 UTCGHSA enrichment
  39. 2026-09-18 03:12 UTCGHSA enrichment
  40. 2026-09-17 23:24 UTCGHSA enrichment
  41. 2026-09-17 19:35 UTCEG score recompute
  42. 2026-09-17 19:35 UTCGHSA enrichment
  43. 2026-09-17 19:25 UTCEPSS rescore
  44. 2026-09-17 15:47 UTCGHSA enrichment
  45. 2026-09-17 11:59 UTCGHSA enrichment
  46. 2026-09-17 08:11 UTCGHSA enrichment
  47. 2026-09-17 04:23 UTCGHSA enrichment
  48. 2026-09-17 00:35 UTCGHSA enrichment
  49. 2026-09-16 20:46 UTCGHSA enrichment
  50. 2026-09-16 16:53 UTCEG score recompute
  51. 2026-09-16 16:53 UTCGHSA enrichment
  52. 2026-09-16 14:10 UTCCISA KEV update
  53. 2026-09-16 14:06 UTCEPSS rescore
  54. 2026-09-16 13:05 UTCGHSA enrichment
  55. 2026-09-16 09:17 UTCGHSA enrichment
  56. 2026-09-16 05:28 UTCEG score recompute
  57. 2026-09-16 05:28 UTCGHSA enrichment
  58. 2026-09-16 05:11 UTCEPSS rescore
  59. 2026-09-16 01:41 UTCGHSA enrichment
  60. 2026-09-15 21:53 UTCGHSA enrichment
  61. 2026-09-15 18:05 UTCGHSA enrichment
  62. 2026-09-15 14:17 UTCGHSA enrichment
  63. 2026-09-15 10:29 UTCGHSA enrichment
  64. 2026-09-15 06:40 UTCEG score recompute
  65. 2026-09-15 06:40 UTCGHSA enrichment
  66. 2026-09-15 03:08 UTCEPSS rescore
  67. 2026-09-15 02:52 UTCGHSA enrichment
  68. 2026-09-14 23:05 UTCGHSA enrichment
  69. 2026-09-14 19:24 UTCCISA KEV update
  70. 2026-09-14 19:17 UTCGHSA enrichment
  71. 2026-09-14 15:30 UTCGHSA enrichment
  72. 2026-09-14 11:42 UTCGHSA enrichment
  73. 2026-09-14 07:55 UTCGHSA enrichment
  74. 2026-09-14 04:07 UTCGHSA enrichment
  75. 2026-09-14 00:19 UTCGHSA enrichment

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCambionics/owncloud-exploits
    First seen Dec 5, 2023

    ownCloud exploits for CVE-2023-49105

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2023-49105?
CVE-2023-49105 is a critical vulnerability published on November 21, 2023. An issue was discovered in ownCloud owncloud/core before 10.13.1. An attacker can access, modify, or delete any file without authentication if the username of a victim is known, and the victim has no signing-key configured. This occurs because pre-signed URLs can be accepted even when no…
When was CVE-2023-49105 disclosed?
CVE-2023-49105 was first published in the National Vulnerability Database on November 21, 2023, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-49105 actively exploited?
Yes. CISA added CVE-2023-49105 to the Known Exploited Vulnerabilities catalog on August 27, 2026, affecting ownCloud ownCloud. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2023-49105?
CVE-2023-49105 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2023-49105?
CVE-2023-49105 affects ownCloud ownCloud. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2023-49105?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-49105, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2023-49105

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